- Using a dial gauge, measure the inside diameter of the oil pump housing bushing.
Inner diameter:
- Standard: 38.113-38.138mm (1.500-1.501 inches)
- Max: 38.188mm (1.503 inches)
Important: Measure in different places and take the average. If the measurement value is greater than the maximum, replace the oil pump housing with a new one.
2. Check the reactor shaft bushing.
- Using an indicator, measure the inside diameter of the reactor shaft sleeve.
Inner diameter:
- Standard: 22.201-22.227 mm (0.874-0.875 inches)
- Maximum: 22.257 mm (0.876")
Important: Measure in different places and take the average. If the measurement value is greater than the maximum, replace the reactor shaft with a new one.
3. Check clearance between gear and housing.
- Slide the outer gear all the way to the housing wall. Measure the gap with a feeler gauge.
Gap between gear and housing:
- Standard: 0.075-0.150mm
- Maximum: 0.200mm
4. Check the clearance between the tooth heads of both gears.
- Using a feeler gauge, measure between the teeth of the drive gear and the crescent of the pump casing.
The gap between the heads of the teeth of the drive gear:
- Standard: 0.013-0.292mm (0.001-0.011 inch)
- Maximum: 0.342mm (0.013 inch)
- Using a feeler gauge, measure between the driven gear teeth and the crescent of the pump housing.
The gap between the heads of the teeth of the driven gear:
- Standard: 0.004-0.248mm (0.0001-0.010 inch)
- Maximum: 0.298mm (0.012 inch)
5. Check the end clearance of both gears.
- Using a steel ruler and feeler gauge, measure the end clearance of both gears.
End gap between driving and driven gears:
- Standard: 0.03-0.05mm (0.001 - 0.002 inches)
- Maximum: 0.10mm (0.004 inch)
